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%I #4 Dec 17 2017 15:09:31
%S 7,86,671,5696,49872,430522,3713779,32095222,277299810,2395400876,
%T 20693860360,178774685507,1544423015390,13342196998602,
%U 115262678365111,995749100272238,8602231678929970,74314295339427502,641997874601748641
%N Number of nX4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.
%C Column 4 of A296643.
%H R. H. Hardin, <a href="/A296639/b296639.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A296639/a296639.txt">Empirical recurrence of order 74</a>
%F Empirical recurrence of order 74 (see link above)
%e Some solutions for n=5
%e ..0..1..0..0. .0..0..0..0. .1..1..0..0. .1..0..0..0. .1..0..0..1
%e ..0..1..0..1. .0..0..0..1. .0..0..0..0. .1..0..0..1. .1..0..1..0
%e ..1..0..0..1. .0..1..0..1. .0..0..0..1. .0..1..1..1. .1..0..1..0
%e ..0..0..0..1. .1..0..0..1. .0..0..0..1. .0..1..0..0. .0..0..1..0
%e ..0..0..0..1. .0..1..1..0. .0..0..1..0. .0..0..0..0. .0..0..0..0
%Y Cf. A296643.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 17 2017
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